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Date: Fri, 26 Aug 2011 11:18:41 +0100
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: greg@...ah.com, linux-kernel@...r.kernel.org
Subject: [PATCH 4/9] gma500: do a pass over the FIXME tags
From: Alan Cox <alan@...ux.intel.com>
Signed-off-by: Alan Cox <alan@...ux.intel.com>
---
drivers/staging/gma500/cdv_device.c | 1 -
drivers/staging/gma500/framebuffer.c | 7 ++++--
drivers/staging/gma500/gem.c | 5 +---
drivers/staging/gma500/gtt.c | 30 ++++++++++++++++----------
drivers/staging/gma500/intel_opregion.c | 1 +
drivers/staging/gma500/mdfld_intel_display.c | 12 ++++++----
drivers/staging/gma500/mrst_crtc.c | 16 ++++----------
drivers/staging/gma500/psb_drv.c | 1 -
drivers/staging/gma500/psb_intel_lvds.c | 1 -
drivers/staging/gma500/psb_lid.c | 2 --
10 files changed, 38 insertions(+), 38 deletions(-)
diff --git a/drivers/staging/gma500/cdv_device.c b/drivers/staging/gma500/cdv_device.c
index 87614e0..8ec10ca 100644
--- a/drivers/staging/gma500/cdv_device.c
+++ b/drivers/staging/gma500/cdv_device.c
@@ -30,7 +30,6 @@
#define VGA_SR_INDEX 0x3c4
#define VGA_SR_DATA 0x3c5
-/* FIXME: should check if we are the active VGA device ?? */
static void cdv_disable_vga(struct drm_device *dev)
{
u8 sr1;
diff --git a/drivers/staging/gma500/framebuffer.c b/drivers/staging/gma500/framebuffer.c
index ebfde13..7748331 100644
--- a/drivers/staging/gma500/framebuffer.c
+++ b/drivers/staging/gma500/framebuffer.c
@@ -733,9 +733,12 @@ static void psb_setup_outputs(struct drm_device *dev)
clone_mask = (1 << INTEL_OUTPUT_MIPI2);
break;
case INTEL_OUTPUT_HDMI:
- if (IS_MFLD(dev))
+ /* HDMI on crtc 1 for SoC devices and crtc 0 for
+ Cedarview. HDMI on Poulsbo is only via external
+ logic */
+ if (IS_MFLD(dev) || IS_MRST(dev))
crtc_mask = (1 << 1);
- else /* FIXME: review Oaktrail */
+ else
crtc_mask = (1 << 0); /* Cedarview */
clone_mask = (1 << INTEL_OUTPUT_HDMI);
break;
diff --git a/drivers/staging/gma500/gem.c b/drivers/staging/gma500/gem.c
index 65fdd6b..f6433c0 100644
--- a/drivers/staging/gma500/gem.c
+++ b/drivers/staging/gma500/gem.c
@@ -120,8 +120,7 @@ static int psb_gem_create(struct drm_file *file,
/* Initialize the extra goodies GEM needs to do all the hard work */
if (drm_gem_object_init(dev, &r->gem, size) != 0) {
psb_gtt_free_range(dev, r);
- /* GEM doesn't give an error code and we don't have an
- EGEMSUCKS so make something up for now - FIXME */
+ /* GEM doesn't give an error code so use -ENOMEM */
dev_err(dev->dev, "GEM init failed for %lld\n", size);
return -ENOMEM;
}
@@ -191,8 +190,6 @@ int psb_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
* The VMA was set up by GEM. In doing so it also ensured that the
* vma->vm_private_data points to the GEM object that is backing this
* mapping.
- *
- * FIXME
*/
int psb_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
diff --git a/drivers/staging/gma500/gtt.c b/drivers/staging/gma500/gtt.c
index 461ead2..a246239 100644
--- a/drivers/staging/gma500/gtt.c
+++ b/drivers/staging/gma500/gtt.c
@@ -72,9 +72,8 @@ u32 *psb_gtt_entry(struct drm_device *dev, struct gtt_range *r)
* @r: our GTT range
*
* Take our preallocated GTT range and insert the GEM object into
- * the GTT.
- *
- * FIXME: gtt lock ?
+ * the GTT. This is protected via the gtt mutex which the caller
+ * must hold.
*/
static int psb_gtt_insert(struct drm_device *dev, struct gtt_range *r)
{
@@ -111,7 +110,8 @@ static int psb_gtt_insert(struct drm_device *dev, struct gtt_range *r)
* @r: our GTT range
*
* Remove a preallocated GTT range from the GTT. Overwrite all the
- * page table entries with the dummy page
+ * page table entries with the dummy page. This is protected via the gtt
+ * mutex which the caller must hold.
*/
static void psb_gtt_remove(struct drm_device *dev, struct gtt_range *r)
@@ -136,7 +136,8 @@ static void psb_gtt_remove(struct drm_device *dev, struct gtt_range *r)
* @gt: the gtt range
*
* Pin and build an in kernel list of the pages that back our GEM object.
- * While we hold this the pages cannot be swapped out
+ * While we hold this the pages cannot be swapped out. This is protected
+ * via the gtt mutex which the caller must hold.
*/
static int psb_gtt_attach_pages(struct gtt_range *gt)
{
@@ -158,7 +159,7 @@ static int psb_gtt_attach_pages(struct gtt_range *gt)
gt->npage = pages;
for (i = 0; i < pages; i++) {
- /* FIXME: review flags later */
+ /* FIXME: needs updating as per mail from Hugh Dickins */
p = read_cache_page_gfp(mapping, i,
__GFP_COLD | GFP_KERNEL);
if (IS_ERR(p))
@@ -181,7 +182,8 @@ err:
*
* Undo the effect of psb_gtt_attach_pages. At this point the pages
* must have been removed from the GTT as they could now be paged out
- * and move bus address.
+ * and move bus address. This is protected via the gtt mutex which the
+ * caller must hold.
*/
static void psb_gtt_detach_pages(struct gtt_range *gt)
{
@@ -390,15 +392,18 @@ int psb_gtt_init(struct drm_device *dev, int resume)
pg->gtt_phys_start = dev_priv->pge_ctl & PAGE_MASK;
/*
- * FIXME: video mmu has hw bug to access 0x0D0000000,
- * then make gatt start at 0x0e000,0000
+ * The video mmu has a hw bug when accessing 0x0D0000000.
+ * Make gatt start at 0x0e000,0000. This doesn't actually
+ * matter for us but may do if the video acceleration ever
+ * gets opened up.
*/
pg->mmu_gatt_start = 0xE0000000;
pg->gtt_start = pci_resource_start(dev->pdev, PSB_GTT_RESOURCE);
gtt_pages = pci_resource_len(dev->pdev, PSB_GTT_RESOURCE)
>> PAGE_SHIFT;
- /* CDV workaround */
+ /* Some CDV firmware doesn't report this currently. In which case the
+ system has 64 gtt pages */
if (pg->gtt_start == 0 || gtt_pages == 0) {
dev_err(dev->dev, "GTT PCI BAR not initialized.\n");
gtt_pages = 64;
@@ -412,13 +417,16 @@ int psb_gtt_init(struct drm_device *dev, int resume)
if (pg->gatt_pages == 0 || pg->gatt_start == 0) {
static struct resource fudge; /* Preferably peppermint */
-
/* This can occur on CDV SDV systems. Fudge it in this case.
We really don't care what imaginary space is being allocated
at this point */
dev_err(dev->dev, "GATT PCI BAR not initialized.\n");
pg->gatt_start = 0x40000000;
pg->gatt_pages = (128 * 1024 * 1024) >> PAGE_SHIFT;
+ /* This is a little confusing but in fact the GTT is providing
+ a view from the GPU into memory and not vice versa. As such
+ this is really allocating space that is not the same as the
+ CPU address space on CDV */
fudge.start = 0x40000000;
fudge.end = 0x40000000 + 128 * 1024 * 1024 - 1;
fudge.name = "fudge";
diff --git a/drivers/staging/gma500/intel_opregion.c b/drivers/staging/gma500/intel_opregion.c
index d2e6037..d946bc1 100644
--- a/drivers/staging/gma500/intel_opregion.c
+++ b/drivers/staging/gma500/intel_opregion.c
@@ -20,6 +20,7 @@
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
+ * FIXME: resolve with the i915 version
*/
#include "psb_drv.h"
diff --git a/drivers/staging/gma500/mdfld_intel_display.c b/drivers/staging/gma500/mdfld_intel_display.c
index aa2ff55..8eb827e 100644
--- a/drivers/staging/gma500/mdfld_intel_display.c
+++ b/drivers/staging/gma500/mdfld_intel_display.c
@@ -282,7 +282,7 @@ static int mdfld_intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
return -EINVAL;
}
-#if 1 /* FIXME_JLIU7 can't enalbe cursorB/C HW issue. need to remove after HW fix */
+#if 1 /* FIXME_JLIU7 can't enable cursorB/C HW issue. need to remove after HW fix */
if (pipe != 0)
return 0;
#endif
@@ -484,7 +484,7 @@ void mdfld_disable_crtc (struct drm_device *dev, int pipe)
/* FIXME_JLIU7 MDFLD_PO revisit */
/* Wait for vblank for the disable to take effect */
-// MDFLD_PO_JLIU7 psb_intel_wait_for_vblank(dev);
+/* MDFLD_PO_JLIU7 psb_intel_wait_for_vblank(dev); */
/* Next, disable display pipes */
temp = REG_READ(pipeconf_reg);
@@ -561,7 +561,6 @@ static void mdfld_crtc_dpms(struct drm_crtc *crtc, int mode)
//gbdispstatus = true;
}
-
/* FIXME_JLIU7 MDFLD_PO replaced w/ the following function */
/* mdfld_dbi_dpms (struct drm_device *dev, int pipe, bool enabled) */
@@ -1150,8 +1149,11 @@ static int mdfld_crtc_mode_set(struct drm_crtc *crtc,
dev->mode_config.scaling_mode_property, &scalingType);
if (scalingType == DRM_MODE_SCALE_NO_SCALE) {
- /*Moorestown doesn't have register support for centering so we need to
- mess with the h/vblank and h/vsync start and ends to get centering*/
+ /*
+ * Medfield doesn't have register support for centering so
+ * we need to mess with the h/vblank and h/vsync start and
+ * ends to get central
+ */
int offsetX = 0, offsetY = 0;
offsetX = (adjusted_mode->crtc_hdisplay - mode->crtc_hdisplay) / 2;
diff --git a/drivers/staging/gma500/mrst_crtc.c b/drivers/staging/gma500/mrst_crtc.c
index 72464dd..c9311a5 100644
--- a/drivers/staging/gma500/mrst_crtc.c
+++ b/drivers/staging/gma500/mrst_crtc.c
@@ -521,12 +521,11 @@ int mrst_pipe_set_base(struct drm_crtc *crtc,
int x, int y, struct drm_framebuffer *old_fb)
{
struct drm_device *dev = crtc->dev;
- /* struct drm_i915_master_private *master_priv; */
struct psb_intel_crtc *psb_intel_crtc = to_psb_intel_crtc(crtc);
struct psb_framebuffer *psbfb = to_psb_fb(crtc->fb);
int pipe = psb_intel_crtc->pipe;
unsigned long start, offset;
- /* FIXME: check if we need this surely MRST is pipe 0 only */
+
int dspbase = (pipe == 0 ? DSPALINOFF : DSPBBASE);
int dspsurf = (pipe == 0 ? DSPASURF : DSPBSURF);
int dspstride = (pipe == 0) ? DSPASTRIDE : DSPBSTRIDE;
@@ -572,15 +571,10 @@ int mrst_pipe_set_base(struct drm_crtc *crtc,
}
REG_WRITE(dspcntr_reg, dspcntr);
- if (0 /* FIXMEAC - check what PSB needs */) {
- REG_WRITE(dspbase, offset);
- REG_READ(dspbase);
- REG_WRITE(dspsurf, start);
- REG_READ(dspsurf);
- } else {
- REG_WRITE(dspbase, start + offset);
- REG_READ(dspbase);
- }
+ REG_WRITE(dspbase, offset);
+ REG_READ(dspbase);
+ REG_WRITE(dspsurf, start);
+ REG_READ(dspsurf);
pipe_set_base_exit:
gma_power_end(dev);
diff --git a/drivers/staging/gma500/psb_drv.c b/drivers/staging/gma500/psb_drv.c
index 10c8ecd..34cf24a 100644
--- a/drivers/staging/gma500/psb_drv.c
+++ b/drivers/staging/gma500/psb_drv.c
@@ -183,7 +183,6 @@ static void psb_lastclose(struct drm_device *dev)
static void psb_do_takedown(struct drm_device *dev)
{
- /* FIXME: do we need to clean up the gtt here ? */
}
static int psb_do_init(struct drm_device *dev)
diff --git a/drivers/staging/gma500/psb_intel_lvds.c b/drivers/staging/gma500/psb_intel_lvds.c
index c6436da..8b951e3 100644
--- a/drivers/staging/gma500/psb_intel_lvds.c
+++ b/drivers/staging/gma500/psb_intel_lvds.c
@@ -382,7 +382,6 @@ bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder,
if (psb_intel_output->type == INTEL_OUTPUT_MIPI2)
panel_fixed_mode = mode_dev->panel_fixed_mode2;
- /* FIXME: review for Medfield */
/* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */
if (!IS_MRST(dev) && psb_intel_crtc->pipe == 0) {
printk(KERN_ERR "Can't support LVDS on pipe A\n");
diff --git a/drivers/staging/gma500/psb_lid.c b/drivers/staging/gma500/psb_lid.c
index af32851..b867aab 100644
--- a/drivers/staging/gma500/psb_lid.c
+++ b/drivers/staging/gma500/psb_lid.c
@@ -52,8 +52,6 @@ static void psb_lid_timer_func(unsigned long data)
pp_status = REG_READ(PP_STATUS);
} while ((pp_status & PP_ON) == 0);
}
- /* printk(KERN_INFO"%s: lid: closed\n", __FUNCTION__); */
-
dev_priv->lid_last_state = readl(lid_state);
lid_timer_schedule:
--
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